Re: PANIC: double fault in fixup_bad_iret

[Peter Zijlstra]

On Fri, May 29, 2020 at 06:07:11PM +0200, Peter Zijlstra wrote:

> Like with KCSAN, we should blanket kill KASAN/UBSAN and friends (at the
> very least in arch/x86/) until they get that function attribute stuff
> sorted.

Something like so.

---
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 00e378de8bc0..a90d32b87d7e 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -1,6 +1,14 @@
 # SPDX-License-Identifier: GPL-2.0
 # Unified Makefile for i386 and x86_64
 
+#
+# Until such a time that __no_kasan and __no_ubsan work as expected (and are
+# made part of noinstr), don't sanitize anything.
+#
+KASAN_SANITIZE := n
+UBSAN_SANITIZE := n
+KCOV_INSTRUMENT := n
+
 # select defconfig based on actual architecture
 ifeq ($(ARCH),x86)
   ifeq ($(shell uname -m),x86_64)